pata_bk3710: clarify license version and use SPDX header

- clarify license version (it should be GPL 2.0)
- use SPDX header

Acked-by: Sekhar Nori <[e-mail]>
Signed-off-by: Bartlomiej Zolnierkiewicz <[e-mail]>
Signed-off-by: Tejun Heo <[e-mail]>

drivers/ata/pata_bk3710.c

···
+// SPDX-License-Identifier: GPL-2.0
+
 /*
  * Palmchip BK3710 PATA controller driver
  *
···
  *
  * Copyright (C) 2006 Texas Instruments.
  * Copyright (C) 2007 MontaVista Software, Inc., <[e-mail]>
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
  */
 
 #include <linux/ata.h>
···
 }
 
 module_init(pata_bk3710_init);
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");